Knee and core warmer



FIG. 1 is a front perspective view of a knee and core warmer showing the new design as being worn;

FIG. 2 is a left side view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a front view of the knee and core warmer while not being worn by a person; and,

FIG. 6 is a front view thereof, with the upper and lower portions turned inside out.

The broken lines showing the human form illustrate environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a knee and core warmer, as shown and described. 